It all depends on your provider but T-Mobile has that option in the "call" settings. It says "send my caller ID" and you can have it set to network default, yes or no to block it when you call others.

3a/3b thick coarse WL dark brown hair. CG/Mod CG since: 5/4/05. Current products: Right now my hair is in such a tizzy over this winter weather we are hving that nothing really seems to be working. I need a haircut.